Abstract
The food spectrum of multirakered whitefish Coregonus lavaretus pravdinellus was studied. It was shown that C. lavaretus pravdinellus feeds mainly on large zooplankton; however, it also consumes nauplii whose average sizes are considerably smaller than the intergill distance. This fact counts in favor of the view of the active functioning of gill rakers. The type of feeding of C. lavaretus is related to a set of morphological characters of the gill-jaw apparatus and the head, such as the number of gill rakers, the length of the upper and lower jaws, mouth position, and the shape and slope of the snout tip area. A great number of gill rakers allows coregonids to use as food a wider size range of prey.
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